<template>
    <div>
      <!--面包屑导航-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>
      <!--卡片视图-->
      <el-card>
        <!--添加角色按钮区域-->
        <el-row>
          <el-col>
            <el-button type="primary" @click="addRightDialogVisible = true">添加角色</el-button>
          </el-col>
        </el-row>
        <!--角色列表区域-->
        <el-table :data="rolesList" border stripe>
          <!--展开列-->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                <!--一级权限-->
                <el-col :span="5">
                  <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!--二三级权限-->
                <el-col :span="19">
                  <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                    <!--二级权限-->
                    <el-col :span="6">
                      <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item1.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!--三级权限-->
                    <el-col :span="18">
                      <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </template>
          </el-table-column>
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row)">编辑</el-button>
              <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteRole(scope.row.id)">删除</el-button>
              <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>

      <!--分配权限对话框-->
      <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @close="setRightDialogClosed">
        <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
          <el-button @click="setRightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
      </el-dialog>
      <!--添加角色对话框-->
      <el-dialog
        title="添加角色"
        :visible.sync="addRightDialogVisible"
        width="50%"
        @close="addDialogClosed">
        <el-form ref="addFormRef" :rules="addFormRules" :model="addForm" label-width="80px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述">
            <el-input v-model="addForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="addRightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addRole">确 定</el-button>
        </span>
      </el-dialog>
      <!--修改角色对话框-->
      <el-dialog
        title="修改角色"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed">
        <el-form ref="editFormRef" :rules="editFormRules" :model="editForm" label-width="80px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述">
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editRole">确 定</el-button>
        </span>
      </el-dialog>
    </div>
</template>

<script>
export default {
  name: 'Roles',
  data () {
    return {
      // 所有角色列表数据
      rolesList: [],
      // 控制分配权限对话框显示与隐藏
      setRightDialogVisible: false,
      // 所有权限数据
      rightsList: [],
      // 属性控件属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点ID值数组
      defKeys: [],
      // 当前即将分配权限的角色ID
      roleId: '',
      // 控制添加角色对话框的显示与隐藏
      addRightDialogVisible: false,
      // 添加角色的表单数据
      addForm: {
        roleName: '', // 角色名称
        roleDesc: '' // 角色描述
      },
      // 添加角色的表单验证
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ]
      },
      // 控制编辑角色对话框的显示与隐藏
      editDialogVisible: false,
      // 编辑角色信息对象
      editForm: {},
      // 编辑角色的表单验证
      editFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ]
      }
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }
      this.rolesList = res.data
    },
    // 根据ID删除对象的权限
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除!')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败!')
      }
      role.children = res.data
    },
    // 展示分配权限对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败!')
      }
      this.rightsList = res.data
      // console.log(role)
      // 递归获取三级节点ID
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式获取角色下所有三级权限的ID,并保存到defKeys数组中
    getLeafKeys (node, arr) {
      // 如果当前node节点不包含children属性,则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      }
      this.$message.success('分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
    // 添加角色
    addRole () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return false
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败!')
        }
        this.$message.success('添加角色成功!')
        this.addRightDialogVisible = false
        this.getRolesList()
      })
    },
    // 监听添加角色对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
      this.addForm.roleDesc = ''
    },
    // 显示编辑角色对话框
    async showEditDialog (roleInfo) {
      const { data: res } = await this.$http.get(`roles/${roleInfo.id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败!')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 编辑角色
    editRole () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return false
        const { data: res } = await this.$http.put(`roles/${this.editForm.roleId}`, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) {
          return this.$message.error('编辑角色失败!')
        }
        this.$message.success('编辑角色成功!')
        this.editDialogVisible = false
        this.getRolesList()
      })
    },
    // 监听编辑用户对话框关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 删除角色
    async deleteRole (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(error => error)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除!')
      }
      const { data: res } = await this.$http.delete(`roles/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败!')
      }
      this.$message.success('删除角色成功!')
      this.getRolesList()
    }
  }
}
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }
  .bdtop {
    border-top: 1px solid #eeeeee;
  }
  .bdbottom {
    border-bottom: 1px solid #eeeeee;
  }
  .vcenter {
    display: flex;
    align-items: center;
  }
</style>
